The school was founded and run by the Brothers of St. Gabriel since 1979 as the thirteenth educational institution of the congregation.

Assumption College Samrong was established when Vichai Maleenont, the founder of BEC World who was the director of Theparak Estate Co., Ltd. at the time, donated 23,708 sqm.

and 3,000,000 Thai Baht in cash to the Brothers of St. Gabriel for the purpose of establish Assumption College Samrong which was named after the district it was located at the time.

In its first academic year, it offered classes from grade 1 through 6, consisting 8 classrooms, 15 teachers and 371 students.

It was finished in half of the full plan at the time they opened in 1979 for its first academic semester.

It was blessed by Cardinal Michael Michai Kitbunchu (then a regular Archbishop, pre-elevation to the cardinalate) and inaugurated by Sanya Dharmasakti, president of the Privy Council on 25 August 1979.

Both Administrative and Montfort building was blessed by Cardinal Michael Michai Kitbunchu and inaugurated by Princess Soamsawali, the senior consort and former wife of King Maha Vajiralongkorn.

The building was blessed by Cardinal Michael Michai Kitbunchu and inaugurated by Princess Maha Chakri Sirindhorn.

The building consists of 2 swimming pools, a fitness centre and physical education facilities.

Both swimming pools and fitness centre are open for public use after school time.